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Old 04-23-2003, 05:45 PM   #1
bigdweeb
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Default Cobb CAI whistle

I just threw my Cobb CAI on during my lunch break and took the RS for a ride through my office park to test things out. When I accelerate moderately hard, I hear a distinct whistle now.

I checked all the vaccuum hoses to make sure they were all tight. I got new hoses from Cobb, but the diameter is slightly less than the stock stuff so I cannot use those pressure clips. The connections seem tight though.

I had someone listen while I had the car parked with the hood open and the engine revving. It seems that we have located where the sound is coming from. It is coming from the end of the intake in the fender openning.

The intake is going into the hole closest to the passenger cabin, resting on the opening. There are a couple of hoses or wires running through there that sit pretty close together...

So the question is: Has anyone else had this problem? Could those two hoses/wires being so close act as reeds and make the whistle? Thanks.
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Old 04-23-2003, 07:31 PM   #2
JC
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You sure it's not the sound of the intake sucking in air?

JC
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Old 04-23-2003, 08:11 PM   #3
Pat L.I.
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this is what i noticed when i installed my cobb. It is more of a hiss than a whistle. and i can easily controll it with the throttle. It happens most when i am at light throttle where if i let off the throttle slightly more engine breaking would occur. it is then that i hear the hissing the most. i think this is completely normal because of the design of the intake vs the stock intake. the stock one would not allow us to hear the air coming in. anyone else agree with me?
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Old 04-23-2003, 08:18 PM   #4
subarucyclist
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It's normal.

That's one of the few disadvantages of virtually any aftermarket intake; the stock one is restrictive but designed to be nice and quiet. My Cobb is louder, makes the same whistle explained above and definitley helped the car run better. Ditto with my buddy's 2.5.
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Old 04-23-2003, 08:40 PM   #5
JC
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I don't think mine whistles? Can you guys describe the sound? I use a catch can though.

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Old 04-23-2003, 09:04 PM   #6
MattDell
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Default

Mine whistles, but I like to pretend it's a turbo spooling up. It helps my ego, if anything.


But, yeah. I was wondering if I was the only one whose intake whisteled. My passengers are always curious because the intake's on their side.




-Matt
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Old 04-23-2003, 11:12 PM   #7
bigdweeb
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Yeah. I figured it was probably normal... it's pretty faint most of the time, and can be modulated with throttle pressure. I was playing with it on the way home from work. I think it happens most when I am cruising with the throttle slightly depressed and then stab the gas. It starts as a high pitch whistle and usually develops into a healthy growl.

I like it so far... sounds pretty mean as the engine winds up.
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Old 04-23-2003, 11:46 PM   #8
watcher in the sky
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Is this the sound?



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Old 04-24-2003, 12:58 AM   #9
nySulli
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yeah, normal stuff, loved the sound of my open intake on my supra, come 3000 rpm, all you would here was the intake ingesting as much air as it could, i can't wait to get a cobb
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Old 04-24-2003, 08:15 AM   #10
bigdweeb
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Quote:
Originally posted by watcher in the sky
Is this the sound?



Damn! I'm hella surprised it took that long for someone to bring Up Bubb Rubb... I don't quite think it's that sound though.
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Old 01-04-2005, 09:57 PM   #11
doubledribble
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did a search is there a way to eliviate this whistle. i just installed the cobb cai on my 03 OBS, it only happens when the throttle is about a 1/4 of the way open or is it something i just have to live with. i'm getting used to it but it's still kind of annoying.
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Old 01-05-2005, 12:26 AM   #12
Crash477
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mine sounds more like a whistle now that i have the equal length headers.
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